/*
Copyright 2022 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package variables

const notFoundReason = "variable not found"

type errorWithReason interface {
	Reason() string
}

// IsNotFoundError checks if the passed error is a notFoundError.
func IsNotFoundError(err error) bool {
	if e, ok := err.(errorWithReason); ok {
		return e.Reason() == notFoundReason
	}
	return false
}

// notFoundError is used when a variable is not found.
type notFoundError struct {
	reason  string
	message string
}

func (e notFoundError) Error() string {
	return e.message
}

// Reason returns the notFoundReason.
func (e notFoundError) Reason() string {
	return e.reason
}
